[Python : 백준 1874] 스택 수열
문제 https://www.acmicpc.net/problem/1874
문제 https://www.acmicpc.net/problem/1874
문제 https://www.acmicpc.net/problem/11729
문제 https://www.acmicpc.net/problem/10828
문제 https://www.acmicpc.net/problem/10773
문제 https://www.acmicpc.net/problem/1065